Answer:
Since BD Bisects ABC,
Hence,
Angle CBD=Angle DBA
-> 55°=x°+12°
-> x° =55°-12°
-> x° =43°
Answer:6
Step-by-step explanation:
3√41
The diagonal can be gotten using the pythagoras theorem
d² = l²+w²
d² = 12²+15²
d² = 144 + 225
d² = 369
d = √9*41
d = 3√41
Hence the diagonal is 3√41